<!DOCTYPE html> 
<html>
    <head>
        <style> body, html {  margin: 0; padding: 0; height: 100%;  } </style>
    </head>
    <body>
        <iframe sandbox="allow-downloads allow-scripts" style="border:none" width="100%" height="100%" src="https://www.Photopea.com" />
    </body>
</html>